population fluctuation 中文意思是什麼

population fluctuation 解釋
群體波動
  • population : n. 1. 人口；人口總數；全體居民；人口的聚居。2. 物的全體[總數]；【生物學】蟲口；種群（量）；群體；族，組，個數；【統計學】對象總體，全域。3. 【物理學】布居；密度。4. 〈罕用語〉殖民。
  • fluctuation : n. 1. 波動，起伏，漲落；【物理學】脈動。2. 動搖不定，躊躇。3. 【生物學】彷徨變異。
  1. According to all previous censuses nationwide and relative documents, this article inspects and analyzes the changes and cause of formation on quantity fluctuation, region distribution and cities and towns distribution of yugur ' s population from 1949 to 2000

    摘要本文根據歷次全國人口普查資料和相關文獻，對1949 - 2000年裕固族的人口數量變動、地理分佈分的歷史變遷及成因進行了考察分析。
  2. This study deals with butterfly diversity and assessing endangered species in natural reserve of baishuijiang in gansu province. the research includes field investigation, observation at certain time and places, captive breeding in experimental area, capture - recapture etc. the biology of four important butterfly species is studied, especially focusing on the natural population life table, habitats, population structure and mobility of byasa impediens. the population developing trend and key factor that result population decline and fluctuation of troides aeacus and byasa impediens are analysed

    本文在甘肅白水江自然保護區碧峰溝通過野外調查、定點定時觀察、實驗地飼養、標記重捕等方法研究了碧峰溝的蝶類多樣性並進行了局部瀕危評估；研究了四種重要蝶類的生物學特性；對長尾麝鳳蝶的生境、自然種群生命表、種群結構、種群移動性進行了深入研究，並估測了各種種群參數，分析了種群發展趨勢。
  3. In chapter 2, we analyzed the effect of the driving field phase fluctuation on the gain and dispersion and population differences in an open v - type three - level non - inversion lasing system and then discussed the effects of the incoherent pumping rate, the ratio of the atomic injection rates, the atomic exit rate, the rabi frequency of the probe and driving fields and their corresponding detuning on the gain, dispersion and population differences of the system, and got some important conclusions different from those in closed or other open systems

    第二章討論了驅動場的相位漲落對開放的v型三能級無反轉激光系統的影響，根據解析解的數值計算結果討論了非相干泵浦速率、粒子注入速率之比、粒子退出速率、探測場和驅動場的rabi頻率和相應失諧對系統增益、色散和粒子數差的影響，得到了一些不同於封閉的v型系統及其他開放的無反轉激光系統的重要結論。
  4. We compared the population size after spawning this year with the size before reproduction season of last year to deduce the degree of population fluctuation. the scope of investigation is almost the same with that of last year except that the middle and upper segments of skyline creek were excluded

    本年度的調查范圍和去年度所做的普查范圍大致相同，但司界蘭溪中、上游溪段在去年度調查結果顯示已無魚群分佈蹤跡，同時因為本年河川流量過大，故於本年度並未調查。
  5. The analytical solutions of the gain, dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered. then the effects of the driving field phase fluctuation on the gain, dispersion and population difference are analyzed by the numerical results from the analytical solutions. our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing, the gain decreases monotonously, however, variation of the dispersion isn ? t monotonous, it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion

    給出了有驅動場位相漲落的開放的梯型無粒子數反轉激光（ lwi ）系統增益、色散和布居數差的定態解析解，進而用得到的數值計算結果分析了驅動場位相漲落對增益、色散和布居數差的影響.研究結果表明，驅動場位相漲落將導致有限線寬;隨著線寬的增加，系統增益單調地減小，但系統色散的變化並不是單調的，當線寬取某個值時，色散有極大值;線寬的變化不能導致無反轉激光向反轉激光的轉變
  6. This thesis, by adhering to a " people - oriented " and " investment and people " principle, carries the research about the relationship between chinese population fluctuation and economic growth. the full text is divided into four chapters : chapter 1 is a research of the relationship between employment and economy increase

    在研究過程中，本文緊密圍繞建設全面小康社會戰略要求，不僅僅關注了經濟的增長，而且還對人口與社會的協調發展給予了足夠的重視，始終堅持「以人文本」和「投資於人」的研究理念，對中國人口變動與經濟增長的關系進行了研究，全文共分為四章:第一章是對勞動就業與經濟增長關系的研究。
  7. In a word, at present, the population problem has become a bottleneck in the development of economic social of shantou city. the paper tries to combine the population fluctuation with the growth of economies and analyze the problem from the quantum, quality and structure of the population, thus putting forward detailed measures

    本文嘗試將人口與經濟發展相結合來分析研究經濟社會發展中的人口數量、人口素質、人口結構存在的一些問題，分析評價汕頭市人口特點對經濟社會發展的協調度，並針對問題提出具體的對策措施。
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